This page lists 68 electrical switch & relay parts for the 2015 Audi TT, across 17 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2015 Audi TT, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Oil Pressure Sender / Switch (29 parts), A/C Refrigerant Pressure Switch (6 parts) and Brake Light Switch (5 parts). The other 14 part types cover the remaining 28 parts.
The 2015 Audi TT came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
20 brands supply electrical switch & relay parts for the 2015 Audi TT, led by HELLA (10 parts), STANDARD MOTOR PRODUCTS (10 parts) and WELLS (10 parts), plus 17 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2015 Audi TT. 10 parts have it, including FOUR SEASONS 20972 (A/C Refrigerant Pressure Switch) and STANDARD MOTOR PRODUCTS SLS473 (Brake Light Switch). Each part number opens a page with every vehicle that part fits.
A/C Condenser Fan Motor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 4-pin connector | View on Amazon |
This table covers the relays that control the A/C Condenser Fan Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2015 Audi TT — HELLA 933332451.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Popular | 20972 | 🇺🇸 US 🇨🇦 CA | Pressure Switch | View on Amazon |
| UAC Popular | SW11103C | 🇺🇸 US 🇨🇦 CA | Pressure Transducer | View on Amazon |
| DORMAN | 904613 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GPD | 1711653 | 🇺🇸 US 🇨🇦 CA | TT QuattroPressure Transducer | View on Amazon |
| HOLSTEIN | 2HPS0001 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VEMO | V10730002 | 🇺🇸 US 🇨🇦 CA | Plug (Connector): 3 PinsThread Size: 7/16" 20 UNF Female | View on Amazon |
This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
6 A/C Refrigerant Pressure Switch parts are listed for the 2015 Audi TT, from FOUR SEASONS, UAC, DORMAN and 3 other brands. FOUR SEASONS 20972 carries the "Popular" badge.
This group includes FOUR SEASONS 20972, UAC SW11103C and DORMAN 904613 and the remaining parts above.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 4-pin connector | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA | Functions: Fuel Pump Relay | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Accessory Power circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
3 Accessory Power Relay parts for the 2015 Audi TT come from 3 brands — HELLA, STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: HELLA 933332451, STANDARD MOTOR PRODUCTS RY577 and WELLS 1R2303.
Alternator / Generator Diode Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY1981 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the relays that control the Alternator / Generator Diode circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
This group shows a single part: STANDARD MOTOR PRODUCTS RY1981.
Back Up / Reverse Lamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI | CI51030 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Back Up / Reverse Lamp switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2015 Audi TT — MARELLI CI51030.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730389 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS473 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| FACET | 71232 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
| ROSTRA | 620097 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1S10862 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Brake Light Switch parts are listed for the 2015 Audi TT, from VEMO, STANDARD MOTOR PRODUCTS, FACET and 2 other brands. STANDARD MOTOR PRODUCTS SLS473 carries the "Popular" badge.
In the Economy grade, VEMO supplies 1 part: the catalog's value-priced group. A representative part number is VEMO V10730389.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, FACET, ROSTRA and 1 other brand — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS473 is listed in this group.
Part numbers include STANDARD MOTOR PRODUCTS SLS473, VEMO V10730389 and FACET 71232, among others listed above.
Clutch Pedal Position / Starter Safety Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FACET | 71309 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
| STANDARD MOTOR PRODUCTS | NS692 | 🇺🇸 US 🇨🇦 CA | Connector Gender: Female | View on Amazon |
| WELLS | 1S16670 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
This table covers the Clutch Pedal Position / Starter Safety switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Clutch Pedal Position / Starter Safety Switch parts for the 2015 Audi TT come from 3 brands — FACET, STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: FACET 71309, STANDARD MOTOR PRODUCTS NS692 and WELLS 1S16670.
Fog / Driving Lamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 4-pin connector | View on Amazon |
This table covers the relays that control the Fog / Driving Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2015 Audi TT — HELLA 933332451.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 4-pin connector | View on Amazon |
This table covers the relays that control the Fuel Pump / Circuit Opening circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2015 Audi TT — HELLA 933332451.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 965453801 | 🇺🇸 US 🇨🇦 CA | 5-pin connector | View on Amazon |
| VEMO | V15710040 | 🇺🇸 US 🇨🇦 CA | Plug (Connector): 5 Pins | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Horn circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
3 Horn Relay parts for the 2015 Audi TT come from 3 brands — HELLA, VEMO and WELLS.
Listed part numbers: HELLA 965453801, VEMO V15710040 and WELLS 1R2303.
HVAC Control Switch / Panel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER | 1711653 | 🇺🇸 US 🇨🇦 CA | Air Conditioning SwitchwithPRESSURE TRANSDUCER | View on Amazon |
This table covers the HVAC Control Switch panels.
This group shows a single part: ULTRA-POWER 1711653.
Ignition Starter Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP | SKUS672 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
| VEMO | V15803229 | 🇺🇸 US 🇨🇦 CA | Plug (Connector): 6 Pins | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | US672 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
| ROSTRA | 630052 | 🇺🇸 US 🇨🇦 CA | Key Type | View on Amazon |
| WELLS | 1S10953 | 🇺🇸 US 🇨🇦 CA | without keyless ignition system | View on Amazon |
This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Ignition Starter Switch parts for the 2015 Audi TT come from 5 brands — SKP, VEMO, STANDARD MOTOR PRODUCTS and 2 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS US672.
The Economy section: 2 options from SKP and VEMO. SKP SKUS672 is listed in this group.
Standard Replacement: 3 parts, from STANDARD MOTOR PRODUCTS, ROSTRA and WELLS. A representative part number is STANDARD MOTOR PRODUCTS US672.
This group includes STANDARD MOTOR PRODUCTS US672, SKP SKUS672 and VEMO V15803229 and the remaining parts above.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | 0986AH0307 | 🇺🇸 US 🇨🇦 CA | Multi-Purpose Relay | View on Amazon |
| WELLS | 1R1007 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
2 Multi-Function Relay parts are listed for the 2015 Audi TT, from BOSCH and WELLS.
Part numbers include BOSCH 0986AH0307 and WELLS 1R1007.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Popular | ELP0078 | 🇺🇸 US 🇨🇦 CA | TT QuattroBrown, with .55-.85 Bar | View on Amazon |
| FAMOUS BRAND | SBA1115 | 🇺🇸 US 🇨🇦 CA | Oil Pressure Sender or Switch2 PIN TERMINAL | View on Amazon |
| HOLSTEIN | 2OPS0070 | 🇺🇸 US 🇨🇦 CA | TTS Quattro | View on Amazon |
| VEMO | V15992000 | 🇺🇸 US 🇨🇦 CA | Thread Size: M10 X 10.55 | View on Amazon |
| VEMO | V10730084 | 🇺🇸 US 🇨🇦 CA | Plug (Connector): 1 Pin or 2 PinThread Size: M10 X 1 | View on Amazon |
| VEMO | V10540006 | 🇺🇸 US 🇨🇦 CA | TT Quattro | View on Amazon |
| WALKER PRODUCTS | 2561061 | 🇺🇸 US 🇨🇦 CA | TT QuattroBrown | View on Amazon |
| WALKER PRODUCTS | 2561033 | 🇺🇸 US 🇨🇦 CA | TT Quattro2.15-2.95 BAR | View on Amazon |
| WALKER PRODUCTS | 2561072 | 🇺🇸 US 🇨🇦 CA | TTS Quattro | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Popular | 2011754 | 🇺🇸 US 🇨🇦 CA | TT Quattrowith Light | View on Amazon |
| BECK/ARNLEY Popular | 2011983 | 🇺🇸 US 🇨🇦 CA | TT Quattrowith Light | View on Amazon |
| FACET Popular | 70132 | 🇺🇸 US 🇨🇦 CA | TT Quattro0.55-0.85 BAR | View on Amazon |
| HELLA Popular | 008280001 | 🇺🇸 US 🇨🇦 CA | 1-Pin ConnectorColor: Green or Brown | View on Amazon |
| HELLA Popular | 008280031 | 🇺🇸 US 🇨🇦 CA | 1-Pin ConnectorColor: Brown | View on Amazon |
| BECK/ARNLEY | 2011877 | 🇺🇸 US 🇨🇦 CA | TTS Quattrowith Light | View on Amazon |
| FACET | 70192 | 🇺🇸 US 🇨🇦 CA | TT Quattro2.15-2.95 BAR | View on Amazon |
| HELLA | 009600241 | 🇺🇸 US 🇨🇦 CA | 1-Pin ConnectorColor: Black or Color: Blue | View on Amazon |
| HELLA | 008280101 | 🇺🇸 US 🇨🇦 CA | 2-Pin ConnectorColor: Black | View on Amazon |
| ROSTRA | 501285 | 🇺🇸 US 🇨🇦 CA | Fits TTS Quattroor TT Quattrowith 2 Pin Terminals | View on Amazon |
| ROSTRA | 501269 | 🇺🇸 US 🇨🇦 CA | TT Quattrowith Brown Connector | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS400 | 🇺🇸 US 🇨🇦 CA | Color: Brown, Silver | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS443 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS489 | 🇺🇸 US 🇨🇦 CA | Terminal Quantity: 2 | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS665 | 🇺🇸 US 🇨🇦 CA | BlackColor: Green | View on Amazon |
| WELLS | 1S6875 | 🇺🇸 US 🇨🇦 CA | Connector Gender: Female | View on Amazon |
| WELLS | 1S10846 | 🇺🇸 US 🇨🇦 CA | TTS Quattro1.20 - 1.60 Bar | View on Amazon |
| WELLS | 1S12101 | 🇺🇸 US 🇨🇦 CA | TT Quattro2.15 - 2.95 Bar | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | OS3596 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN | 2OPS0303 | 🇺🇸 US 🇨🇦 CA | TT QuattroDark Blue | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
29 Oil Pressure Sender / Switch parts are listed for the 2015 Audi TT, from HELLA, STANDARD MOTOR PRODUCTS, VEMO and 9 other brands. REIN ELP0078 carries the "Popular" badge. Economy and Standard Replacement are all represented, and Standard Replacement alone accounts for 18 parts.
Outside Mirror Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730340 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Outside Mirror switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: VEMO V10730340.
Power Window Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730008 | 🇺🇸 US 🇨🇦 CA | RightTT Quattro | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 661151 | 🇺🇸 US 🇨🇦 CA | Front LeftTT Quattro | View on Amazon |
| STANDARD MOTOR PRODUCTS | DWS464 | 🇺🇸 US 🇨🇦 CA | RightTT Quattro | View on Amazon |
| WELLS | 1S13084 | 🇺🇸 US 🇨🇦 CA | Front RightTT Quattro | View on Amazon |
This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
4 Power Window Switch parts are listed for the 2015 Audi TT, from VEMO, ROSTRA, STANDARD MOTOR PRODUCTS and 1 other brand.
Economy: 1 part, from VEMO. A representative part number is VEMO V10730008.
The Standard Replacement section: 3 options from ROSTRA, STANDARD MOTOR PRODUCTS and WELLS. ROSTRA 661151 is listed in this group.
Listed part numbers: VEMO V10730008, ROSTRA 661151 and STANDARD MOTOR PRODUCTS DWS464, plus the other parts above.
Radiator Fan Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 4-pin connector | View on Amazon |
This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
This group shows a single part: HELLA 933332451.
Buying Electrical Switch & Relay Parts for a 2015 Audi TT
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch and A/C Refrigerant Pressure Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2015 Audi TT?
Our catalog currently lists 68 electrical switch & relay parts for the 2015 Audi TT across 17 subcategories and 20 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2015 Audi TT?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2015 Audi TT was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2015 Audi TT?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2015 Audi TT
Electrical Switch & Relay Parts for Other Audi TT Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.